After navigating the first three years of his professional career
-- including five UFC appearances -- without a loss, Bader has
tasted defeat in each of his last two outings. “Darth” first fell
to future champion Jon Jones at
UFC 126 in February, succumbing to a top-side guillotine choke
early in the second round.

Bader was then submitted by Tito Ortiz with
a variation of the same maneuver, as the veteran cracked the
28-year-old with a right hand and then slapped on an arm-in
guillotine to seal the deal just under two minutes into their UFC
132 clash.

Like Bader, Brilz also rides back-to-back defeats heading into UFC
139. The 36-year-old suffered his first clear-cut UFC loss in his
most recent outing, falling by knockout in just 20 seconds to
Vladimir
Matyushenko in April.

Prior to that devastating defeat at UFC 129, Brilz had posted a 3-2
record in the UFC, with both his losses coming by way of
contentious split decision to Eliot
Marshall and Antonio
Rogerio Nogueira, respectively.

A finalist on the first season of “Ultimate Fighter,” Bonnar has
competed 13 times for the world's largest promotion. Most recently,
the 34-year-old strung together two victories to close out 2010,
snapping a three-fight losing skid.

Last July “The American Psycho” avenged a controversial loss to
Krzysztof
Soszynski and followed that victory with a clear-cut decision
over Igor
Pokrajac at the “TUF 12” finale in December.

Like his opponent, Kingsbury is also a “TUF” alum, competing on the
show's eighth season and losing a unanimous decision to Tom Lawlor at
the live finale. Since that 2008 defeat, “Kingsbu” has won
four-straight bouts, outpointing Razak
Al-Hassan and Jared
Hamman before knocking out Ricardo
Romero at UFC 126 this February.

The 29-year-old's last Octagon appearance took place at the “TUF
13” finale in June, as Kingsbury earned a hard-fought unanimous nod
over hard-punching Brazilian Fabio
Maldonado.